关键词: 双季稻区, 双季稻区, 品种类型, 晚稻, 产量, 钾

Abstract: Salt damage is one of the important abiotic stresses, limiting plant growth and reducing crop yield and quality. Seeds of 9 Shandong soybean improved varieties were treated with different concentrations of NaCl solution (5, 10, 15 g/L) respectively, and their relative salt injury indexes were analyzed through calculating the seed germination number, relative germination rate, plant height, radicle length and the number of fibrous roots. The results showed that: with the increase of salt concentration, the seed germination number, plant height, and root number all had a decreasing trend, and there were significant differences among the varieties. Under the treatment of 5 g/L salt concentration, the radicle length of 3 varieties showed a rising trend, but other indexes decreased under all the three salt concentrations. Under the treatment of 5 g/L salt concentration, the 9 varieties were all high salt tolerant. Under the treatment of 10 g/L salt concentration, there were 5 hightolerance varieties; under 15 g/L salt concentration, there was one high salt-tolerant variety. Under different salt concentrations, relatively salt injury index had an extremely and significantly negative correlation with the germination rate, well reflecting the salt tolerance of soybean, and providing rich data references and parent materials for improving soybean germplasm resources and the utilization efficiency of saline soil.